Pinus dalatensis

Pinus dalatensis, also known as Vietnamese white pine or Dalat pine,[1] is a species of pine endemic to Indochina. In Vietnam it grows in the mountains of the central and south-central parts of the country at elevations of 1,400 to 2,300 metres (4,600 to 7,500 ft).[3][4] Only recently confirmed from Laos, the population located within the Nakai-Nam Theun Biodiversity Conservation Area is the largest, at the lowest elevation, and the northernmost of the known populations of P. dalatensis.[5]

Pinus dalatensis
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Gymnosperms
Division: Pinophyta
Class: Pinopsida
Order: Pinales
Family: Pinaceae
Genus: Pinus
Subgenus: P. subg. Strobus
Section: P. sect. Quinquefoliae
Subsection: P. subsect. Strobus
Species:
P. dalatensis
Binomial name
Pinus dalatensis
Ferré
Synonyms[2]
  • Pinus wallichiana var. dalatensis (Ferré) Silba

Description

Pinus dalatensis is a medium-sized evergreen tree growing to 30 to 40 metres (98 to 131 ft) tall. It is a member of the white pine group, Pinus subgenus Strobus, and like all members of that group, the leaves ('needles') are in fascicles (bundles) of five, with a deciduous sheath. The needles are finely serrated, and (3-)5–14 cm long.

The cones are slender, 6 to 23 centimetres (2.4 to 9.1 in) long and 2 to 4 centimetres (0.79 to 1.57 in) broad (closed), opening to 3 to 9 centimetres (1.2 to 3.5 in) broad; the scales are thin and flexible. The seeds are small, 6 to 8 millimetres (0.24 to 0.31 in) long, and have a long slender wing 18 to 25 millimetres (0.71 to 0.98 in) long. It is most closely related to the blue pine Pinus wallichiana from the Himalaya.[3][4]

Subspecies

It is divided into two subspecies:[3]

  • Pinus dalatensis subsp. dalatensis. Da Lat region, between 11°50'N and 12°30'N. Cones 6–17 cm long.
  • Pinus dalatensis subsp. procera Businský. Central Vietnam, between 15°00'N and 16°20'N. Cones 13–23 cm long.

References
  1. Thomas, P.; Phan, K.L. (2013). "Pinus dalatensis". IUCN Red List of Threatened Species. 2013: e.T32803A2823679. doi:10.2305/IUCN.UK.2013-1.RLTS.T32803A2823679.en. Retrieved 20 November 2021.
  2. "Pinus dalatensis Ferré". World Checklist of Selected Plant Families. Royal Botanic Gardens, Kew – via The Plant List. Note that this website has been superseded by World Flora Online
  3. Businský, R. (1999). Study of Pinus dalatensis Ferré and of the enigmatic "Pin du Moyen Annam". Candollea 54: 125-143.
  4. Farjon, A. (2005). Pines. Brill ISBN 90-04-13916-8.
  5. Thomas, P.; Sengdala, K.; Lamxay, V.; Khou, E. (2007). "New Records of Conifers in Cambodia and Laos". Edinburgh Journal of Botany. 64: 37–44. CiteSeerX 10.1.1.621.4622. doi:10.1017/S0960428606000734.

Further reading
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